<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        
        div {
            width: 310px;
            height: 190px;
            border: 1px solid #ccc;
            margin: 50px auto;
            padding: 10px;
            position: relative;
        }
        /* 据对定位会覆盖掉padding，贴住border */
        .top{
            position: absolute;
            left: 0;
            top: 0;
        }
        .bo{
            position: absolute;
            right: 0;
            bottom: 0;
        }
        
    </style>
</head>

<body>
    <div>
        <img class="top" src="./images/top_tu.gif">
        <img src="./images/adv.jpg" alt="">
        <img src="./images/br.gif" alt="" class="bo">

    </div>
</body>

</html>